方ｘ　１２＋３ｘ＝－４－５ｘ　ｘ＝？

2007-08-04 10:49 pm

１２＋３ｘ＝－４－５ｘ　ｘ＝？

回答 (5)

2007-08-04 10:52 pm

✔ 最佳答案

１２＋３ｘ＝－４－５ｘ
１２＋４＝－５ｘ－３ｘ
１６＝－８ｘ
ｘ＝－２

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2007-08-05 6:57 pm

12 + 3x = -4 - 5x
3x + 5x = -4 - 12
8x = -16
x = -2

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2007-08-04 10:58 pm

１２＋３ｘ＝－４－５ｘ
１２＋４＝－５ｘ－３ｘ
１６＝－８ｘ
ｘ＝－２

參考: ｍｅ

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2007-08-04 10:55 pm

１２＋４＋３ｘ＝－５ｘ

１６＝－５ｘ－３ｘ

１６＝－８ｘ

ｘ＝－２

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2007-08-04 10:53 pm

12 + 3x = -4 - 5x

12 + 3x + 5x = - 4 - 5x + 5x

12 + 8x = -4

12 + 8x - 12 = -4 - 12

8x = -16

8x / 8 = -16 / 8

x = -2

參考: Myself~~~

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